According to an xbox.com news article, the Halo Wars demo set a record for being the most downloaded demo on it's first day. The article also said that the demo was downloaded over 2 million times in the first 5 days. I guess people are really looking forward to the game.
March 3rd. The Limited Collector Edition is $79.99 at gamestop. Regular is $59.99
LCE get you all these extras:
Three New “Halo 3” Multiplayer Maps – Be one of the first to experience the Mythic Map Pack* which includes three new maps, “Assembly,” “Orbital” and “Sandbox” Halo Wars: Genesis – a beautiful graphic novel by Phil Noto chronicling the first military campaign against the Covenant. The novel centers around the Sprit of Fire on a mission to discover why the Covenant are so interested in the world of Harvest Unique In-game Vehicle – “Honor Guard” Wraith Six Leader Cards – Leaders possess elite skills which can turn the tides of battle Spirit of Fire Patch – Start the journey as an official Spirit of Fire crew member
If you pre-order a copy of LCE you'll get the code for a warthog with flames on it.